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New Interview Questions: July 2026

Questions added to the Dataford question bank in July 2026, ranked by how often they are asked in real interviews.

100questions
~38htotal time
1,758companies covered
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1
CodingStart here. 50 questions · ~1125 min
Linked List ReversalEasy
Practice
Recently asked

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysPearlRapid Ratings InternationalCoBank
Longest Substring Without RepeatsMedium
Practice
Recently asked

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersCohesityNextdoorSnapLogic
Two Sum ProblemEasy
Practice
Recently asked

Find two indices in an array whose values add up to a target using a hash map.

Hash TablesArraysTwo PointersConverseonBMW of North AmericaRiskonnect
Palindrome Function ImplementationEasy
Practice
Recently asked

Determine whether a string reads the same forward and backward using a two-pointer scan.

RecursionStringsTwo PointersInformaticaENGIEDDelivery Hero India
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2
SQL & Data Manipulation50 questions · ~1125 min
Second Highest Without AggregatesMedium
Practice
Recently asked

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsMicron Memory Malaysia Sdn BhdInformaticaExusia
Second Highest Trader SalaryEasy
Practice
Recently asked

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingAntraWNSState Street
SQL Duplicate DetectionMedium
Practice
Recently asked

Find duplicate customer profiles by grouping on identifying fields and returning only repeated records.

Group ByHavingAggregationsUniversity of Southern CaliforniaCircle Internet FinancialRevature
Top Customers SQL QueryEasy
Practice
Recently asked

Aggregate customer sales volume and return Pyramid Consulting's top 10 customers in descending order.

RankingGroup ByAggregationsDarwillMicroStrategyAmaris Consulting
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