What will be the output of: int x = 5; x += 3; printf("%d", x);?

The correct answer is B: 8. The operator += means x = x + 3. So x = 5 + 3 = 8. The printf statement outputs 8.

What is the output of the following C code? int x = 5; printf("%d", x++);

The correct answer is B: 5. The post-increment operator (x++) returns the current value of x before incrementing. So printf prints 5, and then x becomes 6.

In the context of graph databases, what is the primary advantage over relational databases for relationship-heavy queries?

The correct answer is B: Faster execution of complex relationship traversals. Graph databases excel at querying relationships with O(1) traversal time, whereas relational databases require expensive JOIN operations for similar queries.

Consider: int *ptr; int arr[] = {1,2,3}; ptr = arr; What is ptr[1]?

The correct answer is B: 2. When ptr points to the array arr, ptr[1] is equivalent to *(ptr+1), which accesses the second element of the array, which is 2.

Which of the following correctly represents a structure declaration in C?

The correct answer is C: Both A and B are correct. Both are valid syntax. Option A declares an anonymous structure with immediate variable instantiation. Option B declares a named structure type that can be used later to create variables.

Cognizant Interview Questions

Cognizant — Interview Questions

Aptitude · Reasoning · English · CS — Corporate & Campus Interview Prep

23 Questions 5 Topics Take Test

Showing 1–10 of 23 questions

Q.1 Easy Cognizant

A train travels 120 km in 2 hours and then 180 km in 3 hours. What is the average speed of the train for the entire journey?

A 50 km/h

B 60 km/h

C 70 km/h

D 80 km/h

Correct Answer: B. 60 km/h

Explanation:

Total distance = 120 + 180 = 300 km. Total time = 2 + 3 = 5 hours. Average speed = 300/5 = 60 km/h

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Q.2 Easy Cognizant

If 15% of x is 45, what is 25% of x?

A 65

B 75

C 85

D 95

Correct Answer: B. 75

Explanation:

15% of x = 45, so x = 45/0.15 = 300. Then 25% of 300 = 0.25 × 300 = 75

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Q.3 Easy Cognizant

A shopkeeper buys an item for Rs. 800 and sells it at a profit of 20%. What is the selling price?

A Rs. 920

B Rs. 960

C Rs. 1000

D Rs. 1020

Correct Answer: B. Rs. 960

Explanation:

Selling Price = Cost Price + Profit = 800 + (20% of 800) = 800 + 160 = 960

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Q.4 Easy Cognizant

A man invests Rs. 5000 at 8% per annum simple interest. How much will be his total amount after 3 years?

A Rs. 6200

B Rs. 6400

C Rs. 6600

D Rs. 6800

Correct Answer: A. Rs. 6200

Explanation:

Simple Interest = (P × R × T)/100 = (5000 × 8 × 3)/100 = 1200. Total = 5000 + 1200 = 6200

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Q.5 Easy Cognizant

In a class of 60 students, 35% are girls. How many boys are there?

A 21

B 35

C 39

D 45

Correct Answer: C. 39

Explanation:

Girls = 35% of 60 = 21. Boys = 60 - 21 = 39

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Q.6 Easy Cognizant

The ratio of ages of A and B is 5:3. If A is 20 years old, how old is B?

A 10 years

B 12 years

C 14 years

D 16 years

Correct Answer: B. 12 years

Explanation:

A:B = 5:3. If A = 20, then 5x = 20, so x = 4. B = 3x = 3(4) = 12 years

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Q.7 Easy Cognizant

A box contains 3 red balls, 4 blue balls, and 5 green balls. What is the probability of drawing a red ball?

A 1/4

B 1/3

C 1/2

D 2/5

Correct Answer: A. 1/4

Explanation:

Total balls = 3 + 4 + 5 = 12. P(red) = 3/12 = 1/4

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Q.8 Easy Cognizant

If the cost price is Rs. 500 and profit percentage is 25%, what is the profit amount?

A Rs. 100

B Rs. 125

C Rs. 150

D Rs. 175

Correct Answer: B. Rs. 125

Explanation:

Profit = 25% of 500 = 0.25 × 500 = 125

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Q.9 Easy Cognizant

A worker can complete a task in 10 days. How much work will be done in 3 days?

A 20%

B 25%

C 30%

D 35%

Correct Answer: C. 30%

Explanation:

Work done per day = 1/10 = 10%. In 3 days = 3 × 10% = 30%

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Q.10 Easy Cognizant

If a < b and b < c, which of the following is true?

A a = c

B a > c

C a < c

D c < a

Correct Answer: C. a < c

Explanation:

By transitivity, if a < b and b < c, then a < c

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