Output:
#1 double colon notation ::
The new double colon (::) operator that Java 8 has to convert a normal method into lambda expression. So,
Instead of:
You can do:
#2 Why is stream::iterator used?
…
Java-success.com
Java & Big Data job interview & career companion. Industrial strength know-hows via 800+ Q&As. Fast-track & go places by learning a few Q&As each day on the go.
- Home
- About
- Java
- 100+ Free Java Interview Q&As
- 300+ Java Interview FAQs 🔥
- 150+ Java Architect FAQs
- 150+ Spring & Hibernate Interview FAQs
- 100+ Java coding Q&As
- 100+ Java Code Quality FAQs
- Course: 300+ Core Java Interview Q&As
- Course: 300+ Enterprise Java Interview Q&As
- Course: 300+ Java Architect Interview Q&As
- Course: Self-taught Java Projects
- Big Data
- Techs
- Companion - SQL Interview Q&As 🔥
- Companion - Unix interview Q&As 🔥
- Companion - Git interview Q&As 🔥
- Companion - JavaScript Q&As 🔥
- Companion - JMeter interview Q&As
- Companion - Networking
- Companion - NoSQL Interview Q&As 🔥
- Companion - JSON interview Q&As
- Companion - Regex Interview Q&As 🔥
- Companion - Domain Knowledge Q&As
- Companion - Maven interview Q&As
- Companion - XML Interview Q&As
- Companion - XSD Interview Q&As
- Companion - YAML interview Q&As
- Key Areas
- Key Area - Going places
- Key Area - Ice Breaker
- Key Area - Judging Experience
- Key Area - Debugging
- Key Area - Design Concepts
- Key Area - Design Patterns
- Key Area - Best Practices
- Key Area - CI/CD & DevOps
- Key Area - Concurrency Mgmt
- Key Area - Exception Handling
- Key Area - Low Latency
- Key Area - Memory Mgmt
- Key Area - Performance
- Key Area - Productivity Tools
- Key Area - QoS & SLAs
- Key Area - Scalability
- Key Area - SDLC
- Key Area - Security
- Key Area - Transaction Mgmt
- Career
- Membership
Blog Archives
15 Java old I/O and NIO (i.e. New I/O) interview Q&As
Q1. What is the purpose of Java I/O System? A1. The purpose is to provide an abstraction for all types of I/O like memory, file, directory, network, and pipe. Pipes in Java IO provides the ability for two threads running in the same JVM to communicate with each other. …...
Members Only Content
Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQs6 Key considerations in processing large files in Java
Q1. What are the key considerations in processing large files?
A1. Before jumping into coding, get the requirements.
#1 Trade-offs among CPU, Memory Usage & Disk I/O
Processing a file involves reading from the disk, processing (e.g. parsing an XML and transforming), and writing back to the disk.
…
Processing large files efficiently – BigData & Hadoop – part 3
Q1. What are the different data sizes, and what technologies can be used to process them? A1. In general, data sizes can be classified as shown below. 1) Small size data is < 10 GB in multiple files. … Read more ›...
Members Only Content
Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQsProcessing large files efficiently in Java – multi-threaded code – part 2
If you want to process medium sized data (e.g. 2 GB to 100 GB in multiple files) in Java, consider writing a batch job with Spring batch or Java EE 7.0 batch processing. If processing requires access to other systems, use “spring integration” … Read more ›...
Members Only Content
Login Register 100+ Free Java interview FAQs 100+ Free Big Data interview FAQsRead a text file from Java classpath
File to read: src/main/resources/examples/request.xml
1. Using Java API without any libraries
You can also use the “ClassLoader”
2. Using Java 7 NIO
3.
…
Reading a text file in Java with the Scanner
As a Java developer it is a very common task to read file contents to a String object. It is also very common in pre-interview written tests read the contents of a file and apply regex to split string, etc.
4 things to watch-out for in File processing
1) Files must be closed once read.
…
Reloading configuration files in Java without stopping the server
Q1. Why & when do you want to use properties files for the project configuration as opposed to Java constants?
A1. It is a best practice to externalize application related properties that are likely to change. If you hard code the properties that are likely to change,
…
800+ Java Interview Q&As
300+ Big Data Interview Q&As
Java & Big Data Tutorials
Fast-track & go places
Answers are detailed to be useful beyond job interviews as a career companion with lots of code, diagrams, scenarios, examples & career tips. This will empower you to open more doors without feeling stagnated. Prepare to earn more by empoweting yourself to choose from multiple job offers. You could even explore contracting.
Don't be overwhelmed by the number of questions & answers. Nobody knows everything, but quality of the answers you give to some of the key & frequently asked questions will go a long way in getting you multiple job offers.
Reviews
Don't be overwhelmed by the number of questions & answers. Nobody knows everything, but quality of the answers you give to some of the key & frequently asked questions will go a long way in getting you multiple job offers.
Disclaimer
The contents in this Java-Success are copyrighted and from EmpoweringTech pty ltd. The EmpoweringTech pty ltd has the right to correct or enhance the current content without any prior notice. These are general advice only, and one needs to take his/her own circumstances into consideration. The EmpoweringTech pty ltd will not be held liable for any damages caused or alleged to be caused either directly or indirectly by these materials and resources. Any trademarked names or labels used in this blog remain the property of their respective trademark owners. Links to external sites do not imply endorsement of the linked-to sites. Privacy Policy
© 2023
Java-success.com
Responsive WordPress Theme
powered by
CyberChimps
Top