Arrays Questions

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121.

What is the order of a matrix?

A

number of rows X number of columns

B

number of columns X number of rows

C

number of rows X number of rows

D

number of columns X number of columns

Correct Answer: A

None.

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122.

Which of the following property does not hold for matrix multiplication?

A

Associative

B

Distributive

C

Commutative

D

None of the mentioned

Correct Answer: C

None.

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123.

How do you allocate a matrix using a single pointer in C?(r and c are the number of rows and columns respectively)

A

int *arr = malloc(r * c * sizeof(int));

B

int *arr = (int *)malloc(r * c * sizeof(int));

C

int *arr = (int *)malloc(r + c * sizeof(int));

D

int *arr = (int *)malloc(r * c * sizeof(arr));

Correct Answer: B

None.

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124.

Select the code snippet which performs matrix multiplication.(a and b are the two given matrices, resultant marix is c)

A

a

B

b

C

c

D

d

Correct Answer: A

None.

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125.

If row-major order is used, how is the following matrix stored in memory?

a	b	c
d	e	f
g	h	i

A

ihgfedcba

B

abcdefghi

C

cfibehadg

D

adgbehcfi

Correct Answer: B

None.

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126.

If column-major order is used, how is the following matrix stored in memory?

a	b	c
d	e	f
g	h	i

A

ihgfedcba

B

abcdefghi

C

cfibehadg

D

adgbehcfi

Correct Answer: D

None.

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127.

Which of the following are the uses of matrices?

A

In solving linear equations

B

Image processing

C

Graph theory

D

All of the mentioned

Correct Answer: D

None.

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128.

What is the disadvantage of matrices?

A

Internal complexity

B

Searching through a matrix is complex

C

Not space efficient

D

All of the mentioned

Correct Answer: D

None.

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129.

Matrix A when multiplied with Matrix C gives the Identity matrix I, what is C?

A

Identity matrix

B

Inverse of A

C

Square of A

D

Transpose of A

Correct Answer: B

None.

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130.

Which of the following is not a disadvantage to the usage of array?

A

Fixed size

B

You know the size of the array prior to allocation

C

Insertion based on position

D

Accessing elements at specified positions

Correct Answer: D

None.

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