ZS Associates Placement Papers 2024

Overview

This page collects ZS Associates placement papers from 2024 with previous-year questions, solutions, and the 2024 exam pattern. It is useful when you want real drive history: what the OA looked like, which question types repeated, and how solutions were approached. Work through the papers below to build speed and accuracy, then compare against newer 2025 material so your prep matches both established ZS Associates patterns and the latest shifts.

2024 Pattern

The 2024 ZS Associates placement process emphasized aptitude, logical reasoning, and analytical thinking. Online assessment included aptitude and logical reasoning questions.

ZS Associates Online Assessment 2024 pattern

Section	Questions	Time	Difficulty
Aptitude	20-25	30 min	Medium
Logical Reasoning	15-20	30 min	Medium
Coding	1-2	30 min	Medium

ZS Associates Placement Papers 2024 - actual questions & solutions

This section contains practice questions styled on ZS Associates placement papers 2024 (previous-year pattern), with worked solutions. Use them as timed sectional drills - from student reports drives vary by college and role, so treat this as a high-signal practice bank, not an official paper dump.

Question 1

Q1: Average of 5 numbers is 20. If one number 15 is replaced by 25, what is the new average?

Solution:

Old sum = 5 × 20 = 100. New sum = 100 − 15 + 25 = 110. New average = 110/5 = 22.

Answer: 22

Question 2

Q2: A number is increased by 25% and then decreased by 25%. Find the net percentage change.

Solution:

Let original = 100. After +25% → 125. After −25% → 125 − 31.25 = 93.75.

Net change = 100 − 93.75 = 6.25. Net % = 6.25% decrease (always a loss of (25/10)² %).

Answer: 6.25% decrease

Question 3

Q3: A train 240 m long crosses a pole in 16 seconds. Find its speed in km/h.

Solution:

Speed = distance/time = 240/16 m/s = (240/16) × (18/5) = 54 km/h.

Answer: 54 km/h

Question 4

Q4: A and B together finish a job in 12 days. B alone takes 18 days. How many days does A alone take?

Solution:

Together rate = 1/12. B’s rate = 1/18.

A’s rate = 1/12 − 1/18 = (18−12)/(12×18) = 6/216. Days for A alone = 216/6 = 36 days.

Answer: 36 days

Question 5

Q5: If in a certain code SKY is written as 191125 and SUN as 192114, how is MOON written?

Solution:

Pattern: M=13,O=15,O=15,N=14

Therefore MOON → 13151514.

Answer: 13151514

Question 6

Q6: In a row of 46 students, A is 8th from the left and B is 10th from the right. How many students are between A and B if A is to the left of B?

Solution:

Positions from left: A = 8, B = 46 − 10 + 1 = 37. Students between = 37 − 8 − 1 = 28.

Answer: 28

Question 7

Q7: Choose the synonym of ‘Eloquent’.

Solution:

In placement verbal sections, ‘Eloquent’ is closest in meaning to Fluent among common options.

Answer: Fluent

Question 8

Q8: Choose the antonym of ‘Expand’.

Solution:

‘Expand’ means roughly the opposite of Contract.

Answer: Contract

Question 9: longest common prefix

Show solution

Problem Statement: Find the longest common prefix string amongst an array of strings.

Example:

Input: ["flower","flow","flight"]
Output: "fl"

Solution (Java):

public String longestCommonPrefix(String[] strs) {
    if (strs.length == 0) return "";
    String pref = strs[0];
    for (int i = 1; i < strs.length; i++) {
        while (!strs[i].startsWith(pref)) {
            pref = pref.substring(0, pref.length() - 1);
            if (pref.isEmpty()) return "";
        }
    }
    return pref;
}

Time Complexity: O(S)
Space Complexity: O(1)

Question 10: reverse a string

Show solution

Problem Statement: Given a string, return it reversed.

Example:

Input: "placement"
Output: "tnemecalp"

Solution (Java):

public String reverse(String s) {
    return new StringBuilder(s).reverse().toString();
}

Time Complexity: O(n)
Space Complexity: O(n)

Question 11: valid parentheses

Show solution

Problem Statement: Given a string of brackets, determine if it is valid.

Example:

Input: "()[]{}"
Output: true

Solution (Java):

public boolean isValid(String s) {
    Deque<Character> st = new ArrayDeque<>();
    Map<Character, Character> pair = Map.of(')', '(', ']', '[', '}', '{');
    for (char c : s.toCharArray()) {
        if (pair.containsValue(c)) st.push(c);
        else if (st.isEmpty() || st.pop() != pair.get(c)) return false;
    }
    return st.isEmpty();
}

Time Complexity: O(n)
Space Complexity: O(n)

Key insights from 2024 ZS Associates Online Assessment

1. Aptitude Section is Critical: Must perform well in quantitative and logical reasoning
2. Logical Reasoning: Strong emphasis on analytical thinking and data interpretation
3. Coding Section: 1-2 coding problems in 30 minutes requires good problem-solving skills
4. Time Management: 20-25 aptitude in 30 min + 15-20 logical reasoning in 30 min + 1-2 coding in 30 min
5. Success Rate: Only 15-20% cleared assessment and advanced to interviews
6. Platform: ZS Associates assessment platform
7. Focus Areas: Quantitative aptitude, logical reasoning, data interpretation, analytical thinking

ZS Associates 2024 interview experiences

Based on candidate experiences from 2024 ZS Associates interviews:

2024 Interview Process:

1. Online Assessment (90 minutes): Aptitude (20-25) + Logical Reasoning (15-20) + Coding (1-2)
2. Technical Interview (45-60 minutes): Data interpretation, analytical thinking, problem-solving, case studies
3. HR Interview (30-45 minutes): Behavioral questions, company fit, motivation, analytical mindset

Common 2024 Interview Topics:

• Aptitude: Quantitative reasoning, logical reasoning, syllogism
• Logical Reasoning: Analytical thinking, case studies, data analysis
• Coding: Arrays, strings, basic algorithms, data processing
• Behavioral: Problem-solving approach, analytical mindset, teamwork, motivation

Success Tips:

• Strong aptitude and logical reasoning performance is essential
• Practice data interpretation and analytical thinking
• Understand case study analysis and problem-solving frameworks
• Practice coding problems - arrays, strings, data processing algorithms
• Prepare behavioral examples demonstrating analytical thinking
• Understand ZS Associates’s business model and consulting services

For detailed interview experiences, visit ZS Associates Interview Experience page.

Preparation tips for ZS Associates 2024 pattern

1. Master Aptitude: Focus on quantitative, logical reasoning - practice regularly
2. Data Interpretation: Strong understanding of data interpretation and analytical thinking
3. Case Studies: Practice case study analysis and problem-solving frameworks
4. Practice Previous Year Papers: Solve ZS Associates assessment papers from 2020-2024 to understand patterns
5. Time Management: Practice completing 20-25 aptitude questions in 30 minutes
6. Coding Practice: Practice arrays, strings, basic algorithms, data processing
7. Logical Reasoning: Practice analytical thinking, case studies, data analysis
8. Behavioral Preparation: Prepare examples using STAR format - analytical thinking, problem-solving
9. Mock Tests: Take timed practice tests to improve speed and accuracy
10. Consulting Focus: Understand consulting industry and ZS Associates’s services

Comments & Suggestions

Related resources

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Interview experience→

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