InfyTQ Questions & Solutions | Detailed Explanations

InfyTQ is an online certification and recruitment exam conducted by Infosys for engineering students. It assesses candidates on programming, database management, and aptitude skills. This article covers commonly asked InfyTQ questions along with detailed solutions and explanations.

InfyTQ Exam Pattern

The InfyTQ exam consists of the following sections:

Hands-on Coding Questions (Languages: Python, Java)
Database Management System (DBMS) Questions
Aptitude & Logical Reasoning Questions
Verbal Ability Questions

1. InfyTQ Coding Questions with Solutions

Question 1: Find the Second Largest Number in an Array

Problem Statement: Write a program to find the second largest number in an array without sorting.

Solution in Python:

def second_largest(arr):
    first, second = float('-inf'), float('-inf')
    for num in arr:
        if num > first:
            second, first = first, num
        elif num > second and num != first:
            second = num
    return second if second != float('-inf') else "No second largest element"

arr = [10, 20, 4, 45, 99]
print("Second Largest Number:", second_largest(arr))

Explanation:

The program initializes two variables (first and second) to store the largest and second-largest numbers.
It iterates through the array to find the second largest without sorting.
Time Complexity: O(n)

2. InfyTQ DBMS Questions

Question: What is the difference between Primary Key and Unique Key?

Feature	Primary Key	Unique Key
Uniqueness	Ensures unique values	Ensures unique values
NULL Values	Not Allowed	Allowed
Number of Keys	Only one per table	Multiple unique keys allowed
Usage	Used to uniquely identify a record	Used for uniqueness but not as an identifier

Example:

CREATE TABLE Students (
    StudentID INT PRIMARY KEY,
    Email VARCHAR(50) UNIQUE,
    Name VARCHAR(50)
);

3. InfyTQ Aptitude Questions

Question: Time & Work

Problem Statement: A and B together can complete a task in 10 days. A alone can complete the work in 15 days. In how many days can B alone complete the work?

Solution:

Work done by A in 1 day = 1/15
Work done by A & B in 1 day = 1/10
Work done by B in 1 day = (1/10 – 1/15) = 1/30
Therefore, B alone can complete the work in 30 days

4. InfyTQ Verbal Ability Questions

Question: Sentence Correction

Identify the incorrect part of the sentence:

“Each of the boys in the class are responsible for keeping their desk clean.”

Answer: “are” should be replaced with “is”

Corrected Sentence: “Each of the boys in the class is responsible for keeping their desk clean.”

Explanation:

“Each” is a singular subject, so it requires a singular verb (is instead of are).

Final Thoughts

Practicing InfyTQ questions on programming, DBMS, aptitude, and verbal ability can significantly improve your chances of success. Keep practicing coding problems, SQL queries, and aptitude questions to strengthen your preparation.