Explain Java Constructors and the super Keyword

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Quick Overview

Explain Java object initialization, constructor chaining, and uses of super. Distinguish constructors from methods and examine superclass access and risks of virtual calls during construction.

Explain Java Constructors and the super Keyword

Company: Apple

Role: Software Engineer

Category: Software Engineering Fundamentals

Difficulty: medium

Interview Round: Technical Screen

What is a constructor in Java, how does it differ from a method, and when would you use super? ### What a Strong Answer Covers Explain object initialization, constructor naming and return-type rules, constructor chaining, and access to an inherited implementation or hidden field. Distinguish calling a superclass constructor from overriding a method. ### Follow-up Questions - What happens if a superclass has no accessible no-argument constructor? - Why can calling an overridable method during construction be risky?

Overview: Explain Java object initialization, constructor chaining, and uses of super. Distinguish constructors from methods and examine superclass access and risks of virtual calls during construction.

Read the full Apple Software Engineer interview experience this question came from

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Apple
Mar 14, 2026
mediumSoftware EngineerTechnical ScreenSoftware Engineering Fundamentals
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What is a constructor in Java, how does it differ from a method, and when would you use super?

What a Strong Answer Covers Guidance

Explain object initialization, constructor naming and return-type rules, constructor chaining, and access to an inherited implementation or hidden field. Distinguish calling a superclass constructor from overriding a method.

Follow-up Questions Guidance

  • What happens if a superclass has no accessible no-argument constructor?
  • Why can calling an overridable method during construction be risky?