ShAIkespear/all_indexed_questions · Datasets at Hugging Face

question stringlengths 4 6.13k	question_id int64 0 49.1k	dataset stringclasses 3 values	category stringclasses 75 values
A shadow stack...	300	epfl_qa	epfl_dpo_qa
Select \emph{incorrect} statement. Generic attacks on DES include?	301	epfl_qa	epfl_dpo_qa
In JOS, suppose one Env sends a page to another Env. Is the page copied?	302	epfl_qa	epfl_dpo_qa
In JOS and x86, which register stores the system call number when invoking a system call?	303	epfl_qa	epfl_dpo_qa
For the number of times the apriori algorithm and the FPgrowth algorithm for association rule mining are scanning the transaction database the following is true?	304	epfl_qa	epfl_dpo_qa
Which symmetric key primitive is used in WPA2 encryption?	305	epfl_qa	epfl_dpo_qa
The needed number of DES operations to attack DES is about ...	306	epfl_qa	epfl_dpo_qa
If timeliness is ensured by a communication channel then the channel also provides\ldots?	307	epfl_qa	epfl_dpo_qa
Which one of the following encryption method is a simple substitution cipher?	308	epfl_qa	epfl_dpo_qa
Select the \emph{incorrect} statement. Elliptic Curve Diffie-Hellman is?	309	epfl_qa	epfl_dpo_qa
The test loss of the 1-nearest neighbor classifier is always zero.	310	epfl_qa	epfl_dpo_qa
Tick the \emph{correct} assertion. Assume that $C$ is an arbitrary random permutation.	311	epfl_qa	epfl_dpo_qa
Tick the \textit{incorrect} assertion.	312	epfl_qa	epfl_dpo_qa
Consider a group $G$ with prime order. We can deduce that?	313	epfl_qa	epfl_dpo_qa
Which defense(s) highlight the principle of least privilege in software security?	314	epfl_qa	epfl_dpo_qa
The Merkle-D{\aa}mgard construction is?	315	epfl_qa	epfl_dpo_qa
Tick the \textbf{\emph{incorrect}} assertion.	316	epfl_qa	epfl_dpo_qa
Which one of these is \emph{not} a hard computational problem?	317	epfl_qa	epfl_dpo_qa
Which statement about Singular Value Decomposition (SVD) is true?	318	epfl_qa	epfl_dpo_qa
Increasing the depth of a decision tree cannot increase its training error.	319	epfl_qa	epfl_dpo_qa
Given that $100000000003$ is prime, what is the cardinality of $\mathbf{Z}_{200000000006}^*$?	320	epfl_qa	epfl_dpo_qa
Suppose that an item in a leaf node N exists in every path. Which one is correct? ?	321	epfl_qa	epfl_dpo_qa
Compared to the plain RSA cryptosystem and for equivalent key sizes, the plain Elgamal cryptosystem has\dots?	322	epfl_qa	epfl_dpo_qa
Let $f$ be any hash function with output domain size $N$.	323	epfl_qa	epfl_dpo_qa
In the first pass over the database of the FP Growth algorithm?	324	epfl_qa	epfl_dpo_qa
Your input is "Distributed Information Systems". Your model tries to predict "Distributed" and "Systems" by leveraging the fact that these words are in the neighborhood of "Information". This model can be:?	325	epfl_qa	epfl_dpo_qa
Consider an RSA encryption where the public key is published as $(m, e) = (55, 17)$. Which one of the following numbers is a valid decoding exponent?	326	epfl_qa	epfl_dpo_qa
Using a 4-gram character model, comparing "banana" and "ananas"...	327	epfl_qa	epfl_dpo_qa
Consider a group $G$ with prime order. We can deduce that?	328	epfl_qa	epfl_dpo_qa
Tick the \emph{incorrect} statement. The following statements have been proven:?	329	epfl_qa	epfl_dpo_qa
Tick the \textit{incorrect} assertion. Given an RSA public key $(e,N)$, we \textit{can} efficiently compute square roots in $\mathbb{Z}_{N}^*$ if we have an efficient algorithm that \ldots?	330	epfl_qa	epfl_dpo_qa
Let $$G= egin{pmatrix} 1 &1 &1 &0 &1 &0\ 0 &1 &1 &1 &0 &0\ 0 &1 &1 &0 &0 &0\ 0 &1 &1 &1 &0 &1 \end{pmatrix}$$ be the generator matrix of a $(6,4)$ linear code $\mathcal C$ over $\mathbb F_2$. True or false: $d_{min}=2$.	331	epfl_qa	epfl_dpo_qa
Which of the following attacks makes sense for a MAC:?	332	epfl_qa	epfl_dpo_qa
Let $X$ be a random variable distributed over the alphabet $\mathcal{X}=\{0,1,\ldots,n\}$. Assume also that there exist $x_1,x_2\in\mathcal{X}$ such that $p_X(x_1) eq p_X(x_2)$ ( extit{i.e.}, $X$ is not uniformly distributed over $\mathcal{X}$). Let $Y=2^X$ and $Z=\lfloor X/2 floor$. True or false: $H(Y\|X)=H(Z\|X)$?	333	epfl_qa	epfl_dpo_qa
Which of the following integers has the square roots $\{2,3\}$ when taken modulo $5$ \textbf{and} the square roots $\{3,10\}$ when taken modulo $13$.	334	epfl_qa	epfl_dpo_qa
You are given a hash function $h$ based on the Merkle-Damg{\aa}rd scheme. Which of the following attacks is the most difficult, \emph{a priori}?	335	epfl_qa	epfl_dpo_qa
Which of the following operations would switch the user program from user space to kernel space?	336	epfl_qa	epfl_dpo_qa
The Merkle-D{\aa}mgard construction is?	337	epfl_qa	epfl_dpo_qa
Let $\mathcal{C}$ be the $(6,3)$ linear code on $\mathbb{F}_3$ whose parity-check matrix is egin{equation} H = egin{pmatrix} 2 &0 &1 &1 &1 &0 \ 1 &2 &0 &0 &1 &1 \ 0 &0 &0 &1 &1 &1 \end{pmatrix}. \end{equation} True or false: The matrix egin{equation} ilde{H} = egin{pmatrix} 1 &0 &2 &2 &2 &0 \ 2 &1 &0 &0 &2 &2 \ 0 &0 &0 &2 &2 &2 \end{pmatrix} \end{equation} is also a valid parity-check matrix for $\mathcal{C}$.	338	epfl_qa	epfl_dpo_qa
In a Ranked Retrieval result, the result at position k is non-relevant and at k+1 is relevant. Which of the following is always true (P@k and R@k are the precision and recall of the result set consisting of the k top ranked documents)?	339	epfl_qa	epfl_dpo_qa
Generative Adversarial Networks use the generator and discriminator models during training but only the discriminator for data synthesis.	340	epfl_qa	epfl_dpo_qa
Let $G$ be a set and $$ a commutative operation on pairs of elements from $G.$ Suppose there exists an element $e\in G$ such that $ae=ea=a$ for all $a \in G.$ Also, suppose there exist elements $b,c,d \in G$ such that $bc=dc.$. True or false: If $b ot=d,$ then $(G,)$ cannot be a group.	341	epfl_qa	epfl_dpo_qa
Which of the following is/are true about fuzzing?	342	epfl_qa	epfl_dpo_qa
Consider an RSA encryption where the public key is published as $(m, e) = (35, 11)$. Which one of the following numbers is a valid decoding exponent?	343	epfl_qa	epfl_dpo_qa
We want to generate a $\ell$-bit prime. The complexity is roughly\dots?	344	epfl_qa	epfl_dpo_qa
In a zero-knowledge interactive proof, the prover wants to prove :?	345	epfl_qa	epfl_dpo_qa
Let the first four retrieved documents be N N R R, where N denotes a non-relevant and R a relevant document. Then the MAP (Mean Average Precision) is:?	346	epfl_qa	epfl_dpo_qa
Which of the following is correct regarding schemas and ontologies?	347	epfl_qa	epfl_dpo_qa
One of the following ciphers is a \emph{block} cipher. Which one?	348	epfl_qa	epfl_dpo_qa
Tick the \textbf{incorrect} assumption.	349	epfl_qa	epfl_dpo_qa
The Factoring Problem is equivalent to ...	350	epfl_qa	epfl_dpo_qa
Church booleans are a representation of booleans in the lambda calculus. The Church encoding of true and false are functions of two parameters: Church encoding of tru: t => f => t Church encoding of fls: t => f => f Which of the following functions implements not b?	351	epfl_qa	epfl_dpo_qa
(Text Representation Learning, GloVe) Learning GloVe word vectors is identical to approximating the observed entries of the word/context co-occurence counts by $\mathbf{W} \mathbf{Z}^{\top}$, in the least square sense, if the $f_{d n}$ weights are set to 1 for all observed entries.	352	epfl_qa	epfl_dpo_qa
Consider an RSA encryption where the $(p, q)$ are determined as $(53, 61)$. True or false: $(e,d) = (7, 223)$ are valid encoding/decoding exponents.	353	epfl_qa	epfl_dpo_qa
What is the complexity of generating an RSA modulus of length $2\ell$?	354	epfl_qa	epfl_dpo_qa
Tick the \emph{incorrect} statement. The following statements have been proven:?	355	epfl_qa	epfl_dpo_qa
Which defense(s) highlight the principle of least privilege in software security?	356	epfl_qa	epfl_dpo_qa
Let $f: \mathbb{Z}_{m n} \rightarrow \mathbb{Z}_m \times \mathbb{Z}_n$ be defined by $f (x) = (x \bmod m,x \bmod n)$. Then $f$ is a ring isomorphism between $\mathbb{Z}_{180}$ and:?	357	epfl_qa	epfl_dpo_qa
Consider the classes below and tick the correct answer. class A class B extends A class C[-T]?	358	epfl_qa	epfl_dpo_qa
An HMM model would not be an appropriate approach to identify?	359	epfl_qa	epfl_dpo_qa
What could Out of Vocabulary (OoV) forms consist of? Select all that apply.A penalty will be applied for wrong answers.	360	epfl_qa	epfl_dpo_qa
Consider a neural net with $K$ nodes per hidden layer. In a standard such net we have $K^{2}$ parameters/weights (ignoring the bias terms) per layer. Consider a convolutional net where the data is laid out in a one-dimensional fashion and the filter/kernel has $M$ non-zero terms. Ignoring the bias terms, how many parameters are there per layer?	361	epfl_qa	epfl_dpo_qa
Let $H$ be a hash function based on the Merkle-Damg{\aa}rd construction. The Merkle-Damg{\aa}rd theorem says that \dots?	362	epfl_qa	epfl_dpo_qa
Tick the \emph{correct} statement. $\Sigma$-protocols \ldots?	363	epfl_qa	epfl_dpo_qa
Categorical Cross-Entropy loss:?	364	epfl_qa	epfl_dpo_qa
Which of the following statement(s) is/are correct?	365	epfl_qa	epfl_dpo_qa
Select the \emph{incorrect} statement. UMTS uses?	366	epfl_qa	epfl_dpo_qa
Tick the \textbf{incorrect} assertion regarding plain Rabin, i.e., Rabin without any redundancy.	367	epfl_qa	epfl_dpo_qa
(Stochastic Gradient Descent, cont) SGD in typical machine learning problems requires fewer parameter updates to converge than full gradient descent.	368	epfl_qa	epfl_dpo_qa
Why is natural language processing difficult?Select all that apply.You will get a penalty for wrong answers.	369	epfl_qa	epfl_dpo_qa
Which of the following in Linux x86-64 assembly snippets can be used as a gadget AND can be chained with more gadgets (e.g., in a ROP/JOP chain)?	370	epfl_qa	epfl_dpo_qa
Let $n \geq 2$ be a positive integer, and $M$ a uniformly distributed binary message of length $2n$. Let $P_K(M)$ denote the one-time pad encryption of $M$ with key $K$. Let $K_1$ be a uniformly distributed binary key length $n$. Let $K_2$ be the complement of $K_1$. Let $K_3$ be the reverse of $K_1$. Let $K_i\|\|K_j$ denote the concatenation of the two keys. True or false: Encryption with the key $K_6 = ( K_1\|\| K_3 ) $, $P_{K_6}(M)$ provides perfect secrecy.	371	epfl_qa	epfl_dpo_qa
A page that points to all other pages but is not pointed by any other page would have...	372	epfl_qa	epfl_dpo_qa
Which of the following is/are true about fuzzing with sanitizers?	373	epfl_qa	epfl_dpo_qa
In the GSM infrastructure, which of the following entity contains Ki?	374	epfl_qa	epfl_dpo_qa
Select the \emph{incorrect} statement. Factoring?	375	epfl_qa	epfl_dpo_qa
Which of the following is true?	376	epfl_qa	epfl_dpo_qa
Tick the \emph{correct} assertion. The maximum advantage of an \textbf{adaptive} distinguisher limited to $q$ queries between two random functions $F$ and $F^*$ is always\dots?	377	epfl_qa	epfl_dpo_qa
Let $0\leq\alpha\leq1$ be an unknown constant. Let $X$ be a random variable taking values in $\mathcal{X}=\{0,1,2\}$ with probability $p_X(0) = p_X(1) = \alpha$ and $p_X(2) = 1-2\alpha$. Let $Y$ be a random variable defined as follows egin{equation}Y = egin{cases}1, & ext{if }X=2\0, & ext{if } X eq 2\end{cases}.\end{equation} You also know that $H(X\|Y) = rac{1}{2}$. Choose the correct value of $\alpha$.	378	epfl_qa	epfl_dpo_qa
Select the correct canonical representation(s) of the English verb "to dance" conjugated at the third person singular indicative present. You will get a penalty for wrong ticks.	379	epfl_qa	epfl_dpo_qa
A simple substitution cipher can be broken \dots?	380	epfl_qa	epfl_dpo_qa
What is the benefit of LDA over LSI?	381	epfl_qa	epfl_dpo_qa
Due to the birthday paradox, a collision search in a hash function with $n$-bit output has complexity\dots?	382	epfl_qa	epfl_dpo_qa
(Linear Regression) You are given samples $\mathcal{S}=\left\{\left(\mathbf{x}_{n}, y_{n}\right)\right\}_{n=1}^{N}$ where $\mathbf{x}_{n} \in \mathbb{R}^{D}$ and $y_{n}$ are scalar values. You are solving linear regression using normal equations. You will always find the optimal weights with 0 training error in case of $N \leq D$.	383	epfl_qa	epfl_dpo_qa
Which of the following is \textbf{not} a finite field.	384	epfl_qa	epfl_dpo_qa
Let $\mathcal C_1$ be a linear code over $\mathbb F_3^n$, and let $\mathcal C_2$ be a linear code over $\mathbb F_2^n$. True or false: $\mathcal C_1 \cap \mathcal C_2$ is necessarily a linear code over $\mathbb F_3^n$.	385	epfl_qa	epfl_dpo_qa
A query transformed into the concept space of LSI has?	386	epfl_qa	epfl_dpo_qa
Tick the \textbf{incorrect} assumption. A language $L$ is in NP if\dots?	387	epfl_qa	epfl_dpo_qa
LFSRs are used within \ldots?	388	epfl_qa	epfl_dpo_qa
Which is true?	389	epfl_qa	epfl_dpo_qa
Tick the \emph{true} assertion.	390	epfl_qa	epfl_dpo_qa
Let $h$ be a cryptographic hash function based on the Merkle-Damg{\aa}rd scheme. The Merkle-Damg{\aa}rd Theorem states that\dots?	391	epfl_qa	epfl_dpo_qa
Tick the \textbf{incorrect} assertion regarding plain Rabin, i.e., Rabin without any redundancy.	392	epfl_qa	epfl_dpo_qa
Nearest neighbor classifiers cannot be used for regression because they rely on majority voting, which is not suited for continuous labels.	393	epfl_qa	epfl_dpo_qa
Which of the following operations would switch the user program from user space to kernel space?	394	epfl_qa	epfl_dpo_qa
Which flag prevents user programs from reading and writing kernel data?	395	epfl_qa	epfl_dpo_qa
Which of the following apply to recent Android-based mobile systems but not to Linux-based desktop systems?	396	epfl_qa	epfl_dpo_qa
How many necessary and sufficient queries do we need to distinguish the distribution $P$ from the uniform distribution $U$ with significant advantage?	397	epfl_qa	epfl_dpo_qa
Select \emph{incorrect} statement. The exhaustive search?	398	epfl_qa	epfl_dpo_qa
What is the support of the itemset {beer, chocolate} and the confidence of the rule {chocolate} → {beer} in the dataset below?TID: Items BoughtT1: milk, butter, beerT2: milk, diaper, beer, eggsT3: butter, diaper, beer, chocolate T4: milk, butter, diaper, beerT5: milk, butter, diaper, chocolate ?	399	epfl_qa	epfl_dpo_qa

A shadow stack...

300

epfl_qa

epfl_dpo_qa

Select \emph{incorrect} statement. Generic attacks on DES include?

301

epfl_qa

epfl_dpo_qa

In JOS, suppose one Env sends a page to another Env. Is the page copied?

302

epfl_qa

epfl_dpo_qa

In JOS and x86, which register stores the system call number when invoking a system call?

303

epfl_qa

epfl_dpo_qa

For the number of times the apriori algorithm and the FPgrowth algorithm for association rule mining are scanning the transaction database the following is true?

304

epfl_qa

epfl_dpo_qa

Which symmetric key primitive is used in WPA2 encryption?

305

epfl_qa

epfl_dpo_qa

The needed number of DES operations to attack DES is about ...

306

epfl_qa

epfl_dpo_qa

If timeliness is ensured by a communication channel then the channel also provides\ldots?

307

epfl_qa

epfl_dpo_qa

Which one of the following encryption method is a simple substitution cipher?

308

epfl_qa

epfl_dpo_qa

Select the \emph{incorrect} statement. Elliptic Curve Diffie-Hellman is?

309

epfl_qa

epfl_dpo_qa

The test loss of the 1-nearest neighbor classifier is always zero.

310

epfl_qa

epfl_dpo_qa

Tick the \emph{correct} assertion. Assume that $C$ is an arbitrary random permutation.

311

epfl_qa

epfl_dpo_qa

Tick the \textit{incorrect} assertion.

312

epfl_qa

epfl_dpo_qa

Consider a group $G$ with prime order. We can deduce that?

313

epfl_qa

epfl_dpo_qa

Which defense(s) highlight the principle of least privilege in software security?

314

epfl_qa

epfl_dpo_qa

The Merkle-D{\aa}mgard construction is?

315

epfl_qa

epfl_dpo_qa

Tick the \textbf{\emph{incorrect}} assertion.

316

epfl_qa

epfl_dpo_qa

Which one of these is \emph{not} a hard computational problem?

317

epfl_qa

epfl_dpo_qa

Which statement about Singular Value Decomposition (SVD) is true?

318

epfl_qa

epfl_dpo_qa

Increasing the depth of a decision tree cannot increase its training error.

319

epfl_qa

epfl_dpo_qa

Given that $100000000003$ is prime, what is the cardinality of $\mathbf{Z}_{200000000006}^*$?

320

epfl_qa

epfl_dpo_qa

Suppose that an item in a leaf node N exists in every path. Which one is correct? ?

321

epfl_qa

epfl_dpo_qa

Compared to the plain RSA cryptosystem and for equivalent key sizes, the plain Elgamal cryptosystem has\dots?

322

epfl_qa

epfl_dpo_qa

Let $f$ be any hash function with output domain size $N$.

323

epfl_qa

epfl_dpo_qa

In the first pass over the database of the FP Growth algorithm?

324

epfl_qa

epfl_dpo_qa

Your input is "Distributed Information Systems". Your model tries to predict "Distributed" and "Systems" by leveraging the fact that these words are in the neighborhood of "Information". This model can be:?

325

epfl_qa

epfl_dpo_qa

Consider an RSA encryption where the public key is published as $(m, e) = (55, 17)$. Which one of the following numbers is a valid decoding exponent?

326

epfl_qa

epfl_dpo_qa

Using a 4-gram character model, comparing "banana" and "ananas"...

327

epfl_qa

epfl_dpo_qa

Consider a group $G$ with prime order. We can deduce that?

328

epfl_qa

epfl_dpo_qa

Tick the \emph{incorrect} statement. The following statements have been proven:?

329

epfl_qa

epfl_dpo_qa

Tick the \textit{incorrect} assertion. Given an RSA public key $(e,N)$, we \textit{can} efficiently compute square roots in $\mathbb{Z}_{N}^*$ if we have an efficient algorithm that \ldots?

330

epfl_qa

epfl_dpo_qa

Let $$G= egin{pmatrix} 1 &1 &1 &0 &1 &0\ 0 &1 &1 &1 &0 &0\ 0 &1 &1 &0 &0 &0\ 0 &1 &1 &1 &0 &1 \end{pmatrix}$$ be the generator matrix of a $(6,4)$ linear code $\mathcal C$ over $\mathbb F_2$. True or false: $d_{min}=2$.

331

epfl_qa

epfl_dpo_qa

Which of the following attacks makes sense for a MAC:?

332

epfl_qa

epfl_dpo_qa

Let $X$ be a random variable distributed over the alphabet $\mathcal{X}=\{0,1,\ldots,n\}$. Assume also that there exist $x_1,x_2\in\mathcal{X}$ such that $p_X(x_1) eq p_X(x_2)$ ( extit{i.e.}, $X$ is not uniformly distributed over $\mathcal{X}$). Let $Y=2^X$ and $Z=\lfloor X/2 floor$. True or false: $H(Y|X)=H(Z|X)$?

333

epfl_qa

epfl_dpo_qa

Which of the following integers has the square roots $\{2,3\}$ when taken modulo $5$ \textbf{and} the square roots $\{3,10\}$ when taken modulo $13$.

334

epfl_qa

epfl_dpo_qa

You are given a hash function $h$ based on the Merkle-Damg{\aa}rd scheme. Which of the following attacks is the most difficult, \emph{a priori}?

335

epfl_qa

epfl_dpo_qa

Which of the following operations would switch the user program from user space to kernel space?

336

epfl_qa

epfl_dpo_qa

The Merkle-D{\aa}mgard construction is?

337

epfl_qa

epfl_dpo_qa

Let $\mathcal{C}$ be the $(6,3)$ linear code on $\mathbb{F}_3$ whose parity-check matrix is egin{equation*} H = egin{pmatrix} 2 &0 &1 &1 &1 &0 \ 1 &2 &0 &0 &1 &1 \ 0 &0 &0 &1 &1 &1 \end{pmatrix}. \end{equation*} True or false: The matrix egin{equation*} ilde{H} = egin{pmatrix} 1 &0 &2 &2 &2 &0 \ 2 &1 &0 &0 &2 &2 \ 0 &0 &0 &2 &2 &2 \end{pmatrix} \end{equation*} is also a valid parity-check matrix for $\mathcal{C}$.

338

epfl_qa

epfl_dpo_qa

In a Ranked Retrieval result, the result at position k is non-relevant and at k+1 is relevant. Which of the following is always true (P@k and R@k are the precision and recall of the result set consisting of the k top ranked documents)?

339

epfl_qa

epfl_dpo_qa

Generative Adversarial Networks use the generator and discriminator models during training but only the discriminator for data synthesis.

340

epfl_qa

epfl_dpo_qa

Let $G$ be a set and $*$ a commutative operation on pairs of elements from $G.$ Suppose there exists an element $e\in G$ such that $a*e=e*a=a$ for all $a \in G.$ Also, suppose there exist elements $b,c,d \in G$ such that $b*c=d*c.$. True or false: If $b ot=d,$ then $(G,*)$ cannot be a group.

341

epfl_qa

epfl_dpo_qa

Which of the following is/are true about fuzzing?

342

epfl_qa

epfl_dpo_qa

Consider an RSA encryption where the public key is published as $(m, e) = (35, 11)$. Which one of the following numbers is a valid decoding exponent?

343

epfl_qa

epfl_dpo_qa

We want to generate a $\ell$-bit prime. The complexity is roughly\dots?

344

epfl_qa

epfl_dpo_qa

In a zero-knowledge interactive proof, the prover wants to prove :?

345

epfl_qa

epfl_dpo_qa

Let the first four retrieved documents be N N R R, where N denotes a non-relevant and R a relevant document. Then the MAP (Mean Average Precision) is:?

346

epfl_qa

epfl_dpo_qa

Which of the following is correct regarding schemas and ontologies?

347

epfl_qa

epfl_dpo_qa

One of the following ciphers is a \emph{block} cipher. Which one?

348

epfl_qa

epfl_dpo_qa

Tick the \textbf{incorrect} assumption.

349

epfl_qa

epfl_dpo_qa

The Factoring Problem is equivalent to ...

350

epfl_qa

epfl_dpo_qa

Church booleans are a representation of booleans in the lambda calculus. The Church encoding of true and false are functions of two parameters: Church encoding of tru: t => f => t Church encoding of fls: t => f => f Which of the following functions implements not b?

351

epfl_qa

epfl_dpo_qa

(Text Representation Learning, GloVe) Learning GloVe word vectors is identical to approximating the observed entries of the word/context co-occurence counts by $\mathbf{W} \mathbf{Z}^{\top}$, in the least square sense, if the $f_{d n}$ weights are set to 1 for all observed entries.

352

epfl_qa

epfl_dpo_qa

Consider an RSA encryption where the $(p, q)$ are determined as $(53, 61)$. True or false: $(e,d) = (7, 223)$ are valid encoding/decoding exponents.

353

epfl_qa

epfl_dpo_qa

What is the complexity of generating an RSA modulus of length $2\ell$?

354

epfl_qa

epfl_dpo_qa

Tick the \emph{incorrect} statement. The following statements have been proven:?

355

epfl_qa

epfl_dpo_qa

Which defense(s) highlight the principle of least privilege in software security?

356

epfl_qa

epfl_dpo_qa

Let $f: \mathbb{Z}_{m n} \rightarrow \mathbb{Z}_m \times \mathbb{Z}_n$ be defined by $f (x) = (x \bmod m,x \bmod n)$. Then $f$ is a ring isomorphism between $\mathbb{Z}_{180}$ and:?

357

epfl_qa

epfl_dpo_qa

Consider the classes below and tick the correct answer. class A class B extends A class C[-T]?

358

epfl_qa

epfl_dpo_qa

An HMM model would not be an appropriate approach to identify?

359

epfl_qa

epfl_dpo_qa

What could Out of Vocabulary (OoV) forms consist of? Select all that apply.A penalty will be applied for wrong answers.

360

epfl_qa

epfl_dpo_qa

Consider a neural net with $K$ nodes per hidden layer. In a standard such net we have $K^{2}$ parameters/weights (ignoring the bias terms) per layer. Consider a convolutional net where the data is laid out in a one-dimensional fashion and the filter/kernel has $M$ non-zero terms. Ignoring the bias terms, how many parameters are there per layer?

361

epfl_qa

epfl_dpo_qa

Let $H$ be a hash function based on the Merkle-Damg{\aa}rd construction. The Merkle-Damg{\aa}rd theorem says that \dots?

362

epfl_qa

epfl_dpo_qa

Tick the \emph{correct} statement. $\Sigma$-protocols \ldots?

363

epfl_qa

epfl_dpo_qa

Categorical Cross-Entropy loss:?

364

epfl_qa

epfl_dpo_qa

Which of the following statement(s) is/are correct?

365

epfl_qa

epfl_dpo_qa

Select the \emph{incorrect} statement. UMTS uses?

366

epfl_qa

epfl_dpo_qa

Tick the \textbf{incorrect} assertion regarding plain Rabin, i.e., Rabin without any redundancy.

367

epfl_qa

epfl_dpo_qa

(Stochastic Gradient Descent, cont) SGD in typical machine learning problems requires fewer parameter updates to converge than full gradient descent.

368

epfl_qa

epfl_dpo_qa

Why is natural language processing difficult?Select all that apply.You will get a penalty for wrong answers.

369

epfl_qa

epfl_dpo_qa

Which of the following in Linux x86-64 assembly snippets can be used as a gadget AND can be chained with more gadgets (e.g., in a ROP/JOP chain)?

370

epfl_qa

epfl_dpo_qa

Let $n \geq 2$ be a positive integer, and $M$ a uniformly distributed binary message of length $2n$. Let $P_K(M)$ denote the one-time pad encryption of $M$ with key $K$. Let $K_1$ be a uniformly distributed binary key length $n$. Let $K_2$ be the complement of $K_1$. Let $K_3$ be the reverse of $K_1$. Let $K_i||K_j$ denote the concatenation of the two keys. True or false: Encryption with the key $K_6 = ( K_1|| K_3 ) $, $P_{K_6}(M)$ provides perfect secrecy.

371

epfl_qa

epfl_dpo_qa

A page that points to all other pages but is not pointed by any other page would have...

372

epfl_qa

epfl_dpo_qa

Which of the following is/are true about fuzzing with sanitizers?

373

epfl_qa

epfl_dpo_qa

In the GSM infrastructure, which of the following entity contains Ki?

374

epfl_qa

epfl_dpo_qa

Select the \emph{incorrect} statement. Factoring?

375

epfl_qa

epfl_dpo_qa

Which of the following is true?

376

epfl_qa

epfl_dpo_qa

Tick the \emph{correct} assertion. The maximum advantage of an \textbf{adaptive} distinguisher limited to $q$ queries between two random functions $F$ and $F^*$ is always\dots?

377

epfl_qa

epfl_dpo_qa

Let $0\leq\alpha\leq1$ be an unknown constant. Let $X$ be a random variable taking values in $\mathcal{X}=\{0,1,2\}$ with probability $p_X(0) = p_X(1) = \alpha$ and $p_X(2) = 1-2\alpha$. Let $Y$ be a random variable defined as follows egin{equation*}Y = egin{cases}1, & ext{if }X=2\0, & ext{if } X eq 2\end{cases}.\end{equation*} You also know that $H(X|Y) = rac{1}{2}$. Choose the correct value of $\alpha$.

378

epfl_qa

epfl_dpo_qa

Select the correct canonical representation(s) of the English verb "to dance" conjugated at the third person singular indicative present. You will get a penalty for wrong ticks.

379

epfl_qa

epfl_dpo_qa

A simple substitution cipher can be broken \dots?

380

epfl_qa

epfl_dpo_qa

What is the benefit of LDA over LSI?

381

epfl_qa

epfl_dpo_qa

Due to the birthday paradox, a collision search in a hash function with $n$-bit output has complexity\dots?

382

epfl_qa

epfl_dpo_qa

(Linear Regression) You are given samples $\mathcal{S}=\left\{\left(\mathbf{x}_{n}, y_{n}\right)\right\}_{n=1}^{N}$ where $\mathbf{x}_{n} \in \mathbb{R}^{D}$ and $y_{n}$ are scalar values. You are solving linear regression using normal equations. You will always find the optimal weights with 0 training error in case of $N \leq D$.

383

epfl_qa

epfl_dpo_qa

Which of the following is \textbf{not} a finite field.

384

epfl_qa

epfl_dpo_qa

Let $\mathcal C_1$ be a linear code over $\mathbb F_3^n$, and let $\mathcal C_2$ be a linear code over $\mathbb F_2^n$. True or false: $\mathcal C_1 \cap \mathcal C_2$ is necessarily a linear code over $\mathbb F_3^n$.

385

epfl_qa

epfl_dpo_qa

A query transformed into the concept space of LSI has?

386

epfl_qa

epfl_dpo_qa

Tick the \textbf{incorrect} assumption. A language $L$ is in NP if\dots?

387

epfl_qa

epfl_dpo_qa

LFSRs are used within \ldots?

388

epfl_qa

epfl_dpo_qa

Which is true?

389

epfl_qa

epfl_dpo_qa

Tick the \emph{true} assertion.

390

epfl_qa

epfl_dpo_qa

Let $h$ be a cryptographic hash function based on the Merkle-Damg{\aa}rd scheme. The Merkle-Damg{\aa}rd Theorem states that\dots?

391

epfl_qa

epfl_dpo_qa

Tick the \textbf{incorrect} assertion regarding plain Rabin, i.e., Rabin without any redundancy.

392

epfl_qa

epfl_dpo_qa

Nearest neighbor classifiers cannot be used for regression because they rely on majority voting, which is not suited for continuous labels.

393

epfl_qa

epfl_dpo_qa

Which of the following operations would switch the user program from user space to kernel space?

394

epfl_qa

epfl_dpo_qa

Which flag prevents user programs from reading and writing kernel data?

395

epfl_qa

epfl_dpo_qa

Which of the following apply to recent Android-based mobile systems but not to Linux-based desktop systems?

396

epfl_qa

epfl_dpo_qa

How many necessary and sufficient queries do we need to distinguish the distribution $P$ from the uniform distribution $U$ with significant advantage?

397

epfl_qa

epfl_dpo_qa

Select \emph{incorrect} statement. The exhaustive search?

398

epfl_qa

epfl_dpo_qa

What is the support of the itemset {beer, chocolate} and the confidence of the rule {chocolate} → {beer} in the dataset below?TID: Items BoughtT1: milk, butter, beerT2: milk, diaper, beer, eggsT3: butter, diaper, beer, chocolate T4: milk, butter, diaper, beerT5: milk, butter, diaper, chocolate ?

399

epfl_qa

epfl_dpo_qa